Tire-core



E. LOOKHOLTER.

TIRE CORE.

' APPLICATION HLED DEC. 16, 1918.

Patented Dec. 30,1919.

2 SHEETS-SHEET l.

E. LOOKHOLIEH.

' TIRE CORE.

APPLICATION FILED DEC. 16, 1918.

1 326,675 Patented Dec. 30, 1919.

2 SHEETSSHEET 2.

I N V EN TOR.

ATTORNEY.

ESREAL LOOKHOLTER, OF CHICAGO, ILLINOIS.

TIRE-GORE.

Specification of Letters Patent.

Patented Dec. 30, 1919.

Application filed December 16, 1918. Serial No. 266,882.

To all whom it may concern:

Be it known that I, EsniiAL LooKHoL'rnR, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful TireCore, of which the following is a specification.

This invention relates to improvements in tire-cores-employed in the vulcanization of casings in the operation of repairing the same, and has particular reference to improvements upon that construction of tirecore forming the subject-matter of my application for patent filed August 3d, 1918, Serial Number 248,105.

The objects and advantages of the invention will hereinafter appear and the novel features thereof will be particularly pointed out in the claims.

Referring to the drawings:

Figure 1 is a side elevation of a tire-core embodying my invention;

Fig. 2 is a vertical longitudinal sectional view of the same; or, in other words, a detail of one of the halves or sections in side elevation looking toward the interior;

Fig. 3 is a transverse sectional view on the line 33 of Fig. 2;

Fig. 4 is a vertical sectional view of a fragmentary nature on the line H of Fig. 1;

Fig. 5 is a detail of a fragment of the clamping-screw Fig. 6 is a side elevation of a slightly modified construction of tire-core;

Fig. 7 is a longitudinal sectional view on the line 7-7 of Fig. 6; and

Fig. 8 is a transverse sectional view on the line 8 8 of Fig. 7.

. Similar numerals of reference indicate similar parts in all the figures of the drawings.

Referring more particularly to Figs. 1 to 5 of the drawings, illustrating my preferred form of tire-core, it will be seen that, as in my former construction, I employ opposite sections or sides 1, the same being uniformly curved so that when combined and closed together they will constitute the segment of a circle similar to a tire and agree with the interior of a tire-case. Each of these sections or sides 1 is provided with a pair of hingemembers 2, similar companion hinge-members 3, being provided on bottom sections 4:. The hinge-members 2 and 3 of the sections or sides 1 and the bottom-sections 4,

are connected by pintles 5, and, as will be apparent, the sides or sections 1 are capable of opening and closing.

The bottom-sections 4; are arranged side by side and are so curved in cross-section as to form a continuation of the sides or sections 1. be seen, terminate short of the ends of the sections or sides 1, and they not only form a straight hinge-line upon which the sections or sides 1 may open, but they also permit of the connecting up of the hinge-members from the underside.

One of the bottom-sections 1 is provided with one or more transverse connectingbars 6, which may be welded or otherwise rigidly secured in position and which at their other ends overlap the companion bottom-section and may be secured thereto by screws 7, or any other simple means may be substituted for securing these two parts together. I

The device as a whole is incapable of opening sufficiently far to enable the insention of the pintles 5, or is preferably made so, but by making a removable bottom-section or sections as I have described, these pintles maybe inserted and the parts connected up before the bottom-sections are secured together. So, also, in case of breakage of any of the internal parts or the necessity of repair or replacement of any kind, may the bottom-sections be disconnected and access to theinterior of the core be had.

Each of the sides or sections 1 is provided with preferably a plurality of studs 8, those studs of one section being located opposite those lugs of the companion section, in this instance, there being illustrated three of such pairs, but it will be understood, of course, that they may be increased or diminished from the numbers of pairs shown. These studs merely receive the ends of, in this instance, three helical expansion springs 9, the functions of which are to normally spread the sections or sides 1 apart when not otherwise influenced.

Angular binding-arms 10, project outwardly and upwardly from the opposite ends of each of the sides or sections 1, to a point some distance above the same and sufliciently far to bring their upper ends considerably above the tire-casing when the core is in position therein. p

These arms 10 not only constitute a cen- These bottom-sections, as will venient means for handling the core when it is being inserted into or withdrawn from a casing before and after the operation of vulcanization, but being provided with suitable fastening-means, the core as a whole may be maintained collapsed or closed, which of course, is necessary when the core is being inserted or withdrawn.

Any suitable means for this purpose may be employed, but I prefer that herein shown and which is clearly detailed'in Figs. 4 and 5. In this instance, one of the arms 10 is provided near its upper end with a transverse threaded aperture 11, in which is threaded a bolt 12. This bolt may be provided at its outer end with a head 13, by which it may be conveniently manipulated or turned, and at its opposite or inner end with a reduced neck 14, and a head 15. The companion arm 10 is provided opposite the aperture 11, with a narrow longitudinally disposed slot 16, for the reception of the reduced neck of the bolt, so that when the bolt is in position, an inner shoulder 17, formed 011 the bolt at the inner end of the neck, and the head 15 of said bolt will bear upon the opposite sides of the arm. By rotating the bolts, for there are two employed, one at each end of the core, it will be seen the same and the walls or sections 1 may be forced apart or drawn together, according to the direction of rotation. Indeed, as a matter of fact, by having the bolts thus mounted in position, I may be able to do away with the expansionsprings 9, if desired.

In the construction of core illustrated in Figs. 6 to 8 of the drawings, I employ opposite halves or sides 17, each provided at its meeting-edge with hinge-members 18, the companion members of which are connected by pintles 19. Lugs 20, are arranged in pairs, as before, upon the interiors of the sides or sections 17 and said lugs serve to support expansion-springs 21.

As before, angular arms 22, extend from the opposite ends of each section or side 17 to points well above the same, and in this instance and connection, I have illustrated another simple means for securing such arms and hence the sections or sides 1 together against the expansion of the springs. These means merely involve the use of slidable clamping-rings 23, the same being slipped removably over the upper ends of the arms 10 after the latter have been brought substantially together. The arms 10, it will be understood, in order that they may cooperate with the rings, are preferably tapered slightly, so that the rings may be forced down into position, thereby binding the sides or sections of the core in a closed position.

It will be understood that the described device may be and preferably is made of malleable iron, and is to take the place of the usual rubber core employed in the process of vulcanizing repairs to tire-casmgs. In the latter instance various sizes of cores are required for the various sizes of tires, but with my invention, it being expansible, one core will fit a number of sizes of such casings, thus resulting in considerable saving. Moreover, a core constructed after my invention is practically indestructible, whereas the life of a core made of rubber is comparatively short.

in inserting the core within the casing, it is simply necessary to draw the sections or sides together and secure them aga nst separation during the period of insertion. In the construction shown in Figs. 1 to 5, this is accomplished through a manipulation of the two bolts 12, the outer end of the bolt swiveling in one of the arms 10 while the body-portions of the bolts engage the threads of the threaded aperture of the companion arm. By reversing the rotation of the bolts the arms 10 and sections or sides 1 are spread apart, the springs 9, if employed, assisting in the operation. In the construction illustrated in Figs. 6 to 8, the arms 22 are drawn together by hand and the rings 23 slipped over the upper ends of the arms and settling thereupon retain the arms and sections 17 from spreading. l/Vhen positioned within the tire-casing the rings are removed whereupon the springs 21 serve to spread the sections.

It will be understood, of course, that by the spreading of the core the latter is made to conform to the diameter of the casing in which it is inserted, and that the latter has its walls spread so as to bring them into snucr contact with the vulcanizer in which posltion they are rigidly retained during the entire vulcanizing operation.

Having described my invention, what I claim, is:

1. An arc-shaped tubular tire-core comprising opposite expansible sides, extensions projecting therefrom to points beyond and without the same, and means for retaining said extensions and therefore the sides in adjusted relation.

2. An arc-shaped core comprising opposite loosely connected sides, extensions projecting therefrom to points beyond and without the same, and means for reta'mlng said extensions and therefore the sides in an adjusted relation.

3. An arc-shaped core compris1ngopposite expansible sides, extensions pro ecting therefrom to points beyond and without the same, and means for retaining said extensions and therefore the sides in an adjusted relation.

4:. An arc-shaped core comprising opposite expansible' sides, intermediate springs for expanding the sides, extensions extending from the sides, and means for securing said extensions and sides against the tendency of the springs.

5. An arc-shaped core comprising opposite expansible sides, intermediate springs adapted to influence the sides to move in 0pposite directions, extensions projecting from the sides, and means foriretaining the extensions against the influence of the springs.

6. An arc-shaped core comprising opposite expansible sides and upwardly disposed projecting arms, one of which arms is provided with a threaded aperture and the other with a slot, and a bolt threaded in the aperture of one arm and having areduced neck engaging the slot of the other, and at each side of the neck having a shoulder bearing on the arm, and an operating head for the opposite end of the bolt.

7. An arc-shaped core comprising opposite eXpansible sides, loose connections between the sides, angular arms upwardly disposed from the ends of the sides and terminating at a point above the same, and means connecting the arms and adapted to expand said sides and arms and draw the same together and to retain them in either of such positions.

8. In a tire-core, the combination with ophaving a lower independent bottom-section,

companion hinge-members carried by each side and its bottom-section, pintles engaging said members, and means for securing the tWo bottom sections together, of arms projecting from the ends of the members, and means for adjusting and retaining said arms with relation to each other.

9. In a tire-core, the combination with opposite arc-shaped semi-tubular sides, each having a lower independent bottom-section, companion hinge-members carried by each side and its bottom-section, pintles engaging said members, cross-bars permanently connected to one of the bottom-sections and overlapping and temporarily secured to the other bottom-section, and arms projecting from the ends of said sides and terminating above the same, of means for securing said sides and arms in closed relation.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ESREAL LOOKHOLTER.

Witnesses:

W. S. DUVALL, E, ELLIS. 

